18181926472 has 32 divisors (see below), whose sum is σ = 34557120000. Its totient is φ = 8966924928.

The previous prime is 18181926431. The next prime is 18181926473. The reversal of 18181926472 is 27462918181.

It is not an unprimeable number, because it can be changed into a prime (18181926473) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 642804 + ... + 670492.

It is an arithmetic number, because the mean of its divisors is an integer number (1079910000).

Almost surely, 2^18181926472 is an apocalyptic number.

It is an amenable number.

18181926472 is a deficient number, since it is larger than the sum of its proper divisors (16375193528).

18181926472 is a wasteful number, since it uses less digits than its factorization.

18181926472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28813 (or 28809 counting only the distinct ones).

The product of its digits is 387072, while the sum is 49.

The spelling of 18181926472 in words is "eighteen billion, one hundred eighty-one million, nine hundred twenty-six thousand, four hundred seventy-two".